Linux kernels built with CIFS(CONFIG_CIFS) network file system support
are vulnerable to a NULL pointer dereference flaw. It could occur during a
reconnection attempt.
An unprivileged user/program could use this flaw to crash the system,
resulting in DoS.
Upstream fix:
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-> https://git.kernel.org/linus/ea702b80e0bbb2448e201472127288beb82ca2fe